Is there any difference between welding certificate of pressure vessel and ordinary welding certificate? Ask god for help

Ordinary welder certificate issued by the labor department after examination, equivalent to the title certificate. Pressure vessel welder certificate is divided into junior, intermediate, senior technician and senior technician. Issued by the technical supervision bureau after examination. Many welders without welder's certificate can't engage in the welding of pressure vessels and pipelines. According to the Management Rules for Welder Examination of Boiler, Pressure Vessel and Pressure Pipeline,